Across
1
Biological catalyst
3
Infectious microscopic agent
7
Nerve cell in the brain
8
Naturally occurring inorganic solid
9
Amplified beam of light
10
Substance with pH above 7
11
Smallest unit of an element
Down
2
Curved glass that refracts light
4
Absolute temperature scale unit
5
Group of similar cells
6
Force that attracts objects together